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Figure 9. The parcel of rough spinel on the left, reportedly from Tajikistan, contains pieces weighing up to 48.5 g. The seven faceted spinels on the right (9.04–28.16 ct) were fashioned from some of this rough.
Purplish Pink Spinel from Tajikistan: Before and After Cutting

Nicholas Sturman, March 1, 2009

Purplish Pink Spinel from Tajikistan: Before and After Cutting

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An Examination of Four Important Gems

C. W. Fryer and John I. Koivula, June 1, 1986

Several famous and historical gemstones in the Smithsonian's collection are examined and reported on.

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Padparadscha: What's in a Name?

Robert Crowningshield, March 1, 1983

An examination of the term used to describe a sapphire the colour of a lotus blossom.

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The internal structures of natural pearls from the marine mollusk Pinctada maxima are the subject of the lead article in this issue. The scattered loose pearls on the cover are from Paspaley’s natural pearl collection, which includes one discovered in the 1970s at the Eighty Mile Beach fishing grounds
G&G Spring 2021 Edition
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